You Do Need power plug adapter while traveling from Wales to Maldives.

Here is Why You Need An Adapter

The outlet and plug type used in Maldives are C, D, G, J, K and L and in Wales is G. This is how they look like.

Wales

In Wales, outlets of type G are in use.

Type G

Maldives

In Maldives, outlets of type C, D, G, J, K and L are in use.

Type C

Type D

Type G

Type J

Type K

Type L